Compare any two graphics cards:
VS

GeForce 8800 GTS (G80) 640MB vs Radeon HD 7990

Intro

The GeForce 8800 GTS (G80) 640MB features a GPU clock speed of 513 MHz, and the 640 MB of GDDR3 RAM runs at 792 MHz through a 320-bit bus. It also is comprised of 96 Stream Processors, 48 TAUs, and 20 Raster Operation Units.

Compare all of that to the Radeon HD 7990, which comes with core speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB 143 Watts
Radeon HD 7990 375 Watts
Difference: 232 Watts (162%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7990 should theoretically be a lot better than the GeForce 8800 GTS (G80) 640MB in general. (explain)

Radeon HD 7990 576000 MB/sec
GeForce 8800 GTS (G80) 640MB 63360 MB/sec
Difference: 512640 (809%)

Texel Rate

The Radeon HD 7990 will be quite a bit (approximately 888%) better at AF than the GeForce 8800 GTS (G80) 640MB. (explain)

Radeon HD 7990 243200 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 218576 (888%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7990 is a better choice, by a large margin. (explain)

Radeon HD 7990 60800 Mpixels/sec
GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Difference: 50540 (493%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

Radeon HD 7990

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Display Specifications

Hide Specifications

Model GeForce 8800 GTS (G80) 640MB Radeon HD 7990
Manufacturer nVidia AMD
Year Nov 2006 (640) April 2013
Code Name G80 Malta
Memory 640 MB 3072 MB (x2)
Core Speed 513 MHz 950 MHz (x2)
Memory Speed 1584 MHz 6000 MHz (x2)
Power (Max TDP) 143 watts 375 watts
Bandwidth 63360 MB/sec 576000 MB/sec
Texel Rate 24624 Mtexels/sec 243200 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 60800 Mpixels/sec
Unified Shaders 96 2048 (x2)
Texture Mapping Units 48 128 (x2)
Render Output Units 20 32 (x2)
Bus Type GDDR3 GDDR5
Bus Width 320-bit 384-bit (x2)
Fab Process 90 nm 28 nm
Transistors 681 million 4313 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

Radeon HD 7990

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti Spam by WP-SpamShield